Bag-filling machine



- May 24, 1927.

E. 1.. BUSHMAN ET AL BAG FILLING MACHINE Filed May 7. 1925 May 24, 1921; V D 1329:8150

E. L. BUSHMAN ET AL BAG FILLING MACHINE Filed May 7. 1925 :s Sheets-Sheet 2 May 24. 1927., 1,629,860

E. L. BUSHMAN ET AL BAG FILLING momma: v

FiledMay 7.: 1925 3 Sheets-Sheet 5 rammed May 24, 1927.

UNITED STATES;

PATENT; 0 FICE.

nnwan'n i3. nusmum, or misnomer, NEW mass-Y; xnmvn'rn L. warm, or NEW xonx, x. in; mm Josnuawann, or smzannrn, NEW mnsnr, assronons, BY nmno'r am) misxn assmmnmrs, r0 Barns VALVE use commas, or on:-

CAQO, TLLINOIS, CORPORATION OI WES! VIRGINIA.

nae-mums nacnnm.

Appllcation flied lay 1, 1925. Serial m. 28,551.

This invention relates to valve bag filling machines and more particularly'to machines which are adapted to feed a predetermined weight of material into b to be filled.

An object of the invention is to provide an accurate weighing machine. A feature of the invention is that the bag is partially supported at the top on a resilient] held swiveled filling spout which is carri se arately' from the weighing scale upon which the bottom of the bag is adapted to rest.

, The invention consists in the novel features', arrangements and combination of parts embodied by way of example in the apparatus hereinafter described as illustrating the referred formof the invention, and the I invention will be more particularly pointed Further 0 out in the appended claims.

jects and advantages of the invention will more fully appear from the following descriptiontaken in connection with the accompanying drawings which show, by

wa of example, the present iment of the invention.

Referring to' the drawings in which the same reference characters indicate the same parts in the various views:

Fig. 1 is a side elevation of themachine, with certain parts broken away, showing the machine in filling 'tion.

- Fig. 2 is a a'r view showing the machine in nonfilling position.

-Fig. 3 is a detail view of the gate and sociated parts.

preferred em- Figyis a section taken on line 4-4 of ported by upright members 2-2 and 3-3 i 5 is a section-taken online 5-5 of F i igz 6 is a section taken on line 6-6 of given, setting forth some of the most important features in a general way. feed hopper, for holding the filling mater1al, is supported adjacent the top of the frame structure. A centrifugal impeller or other mesmefeed means is provided adjacent the lower end of this hop r for forcefully feed in the material, an a feed throat 1s provl ed adjacent this impeller and has an openin in register with a tug filling spout. The fil mg spout is pivotally connected to the frame of the machine at a point somewhat to the rear of the feed hopper, and the spout is supported by a resilient means. The feed throat is provided wtih a gate which is operated by gravity to close the feed throat. This gate is held in open sition by a trigger mechanism which 18 re eased when the resilient supporting means is overcome. A weighing scale is arranged below the spout and is. provided with a table for partially supporting the bag to be filled; the bag also being supported jointly by the feed spout.

The resilientmeans has a fixed elasticity which may be overcome by a wei ht far less than the-"weight of material to fed into the bag; and the scale weight is variable to regulate the predetermined mass or weight to.

be placed in the.bags. The' total predetermined weight required in a bag is equal to the wei ht necessary to overcome the elasticity o the s; .ng plus the weight neces sary to balance the scale weight. When this weight is reached the resilient means will yield suificientlyso that the trigger mechanism will operate to release the gate which will then close the feed throat.

Referring to the drawings and more particularly to Figs. 1 and 2:

A hopper or bin 1 for h lding filling material, such for example as cement,'is supwhich are attached at their lower ends to base members H. Rear upright members 5-5 are also attached to base members 4-4 and diagonal brace members 6-6 are attached to the upper ends of members register with a tubular filling spout 12. This spout comprises a tube shaped body and a suitable guide frame or open superstructure 12 projecting forwardly therefrom. This guide is referably formed by a Umember whose si es are attachedto the side walls of the tube and whose closed end extends forwardly and is supportedby a member extending upwardly and rearwardly and attached at its rear end to the top of the tube. This guide may be made slightly yieldable, as by making the U member and its cooperating support of spring wire The'feed spout 12 is pivotally attached to the supports 1313" which are pivotally mounted on bolts 14-14 passing through the respective tie rods 10-10. The rods 1313 extend rearwa'rdly from the pivot bolts 1414 and are free to be moved about their ivot points 14-44 within certain limits xed by the stops 15-45 attached to the tie rods 10 10 adjacent the rear ends of the rods 1 3,-l3.'

A bracket 16 is attached to the-rods 13-13 at a point intermediate the pivots 14 -14 and the stops 15-15 and carries at its upper end a trigger stop 17 A tie rod 18 is pivoted at one end to a lug 18' attached to the member 8 and its other s end is pivotally attached to a part ri 'd with the spout 12. This tie rod, togetier with the pivoted rods 13-43 serve to hold the spout 12 snugly against the face of the.

throat 11 at all times. The maximum vertical movement of the spout l2. with respect to the valve 11 is relatively small, in the pr e sent' embodiment being approximately serrated lower portion 25. The rear end of the weight 24 is ivotally connected to .the lower end of a lin 26, the upper end of 'which is pivotally connected to anarm 27 which is pivoted to the lower end of the link 22 and provided with an upwardly extendinglever 28. a

A trigger 29 is pivoted to the bracket 30 attached to the lower end of the hopper 1 and carries at its lower end a hook 31 and at its upper end is adapted to be engaged by the lever 28. A suitable bracket such asl32 is attached to the tie rods 10-10 adjacent v the bracket 17 and extends upwardly therefrom. A bell crank 33 is pivoted to the upper end of the bracket 32 and, carries on one crank and a rod 34' to the end of which is attached aweight 35, and its othercrank b the trip stop-17. flhelevr 36"il' ing;

y oonne'ctedto a sli'dablyen by a rod 3 8 which throughja sulta 1e bearing'39 attache to the lower end of the hopper I and provided at its front end with a audio 40. At the-junction point ofthe handle 40 and rod 38 a shoulder 41 is-provided v for engagement with the lever 28.

Operatively associated zwith the throat 11 is a te 42.provided with a gate openi 42" w ich is adapted to be vertical] mov to closethethroat opening 11". hisgate 42 carries a catch 43 attached adjacent its upper end and adapted .to be engaged by the hook 29, and-when so held the throatll is in operative position to discharge the fil1-' bell crank45 which is pivoted to a suitable bracket 46 secured to the u'pr' hts 2-2 and the other arm 44' of'the be crank 45 is adapted to be 11 aged b an abutment'47 carried on the rod 38 weight 48 is attached .to the lower end of the te 42. l

A shield or guide plate49 lsauspended from the spout '12 and forms a means for away from the 'up-' right 2 and other parts ofthe suppo'rtingholding the filled bag structure.

Scale supports '50 and 501 are attached'to the uprights 2,- 3 and 5; and 2'33 and '5', respectively, at oints slightly above the members 4-4". are attached to intermediate points of the ulcrum points 51 and 51! members 50 and 50- respectively. Sup.-

ported on these points are scale beams 52 and 52' which carry knife edges 53-53 and 54-54' at their front and rear ends respectively A platform or other suitable supporting portion 55 is provided with downwardly extending bearing portions 5656 adapted to engage the knife edges 53-53 respectivel A weight 57 is provided with downward y extendlng bearing portions 58-458 adapted to engage the knife edges 54-54 respectively. A vertical strut 59 is rigidl attached at its upper end to weight 57. he end of a tie rod 60 is pivotally connected to the lower end of the strut 59.

and the other end of the tie rod 60 is pivot ally connected to a member 61 rigidlyat- 0nd tie rod 62 has one end pivotally attached to the member 61 and its other end is pivotally attached to a vertical strut 63 which is rigidly connected to the platform 55.

An auxiliary rider-weight 64. slidably mounted on the beams 5252, is rovided to allow for finer adjustment. of e scale. It-I will therefore be seen that, due 'to the parallel link motion comprising the 52-42, the tie rods 60'62,' the Sana 59-65 and their associated 'parts, the scale 42 is in open or operative position};-

platforni55 is-restricted toa vertical move ment and is prevented from'tipping sidewise. All of which will-be clearly understood b "thoseskilled in theart. The eed hopper 1 is provided with a suitable centrifugal impe ler 65 adapted to forcefully feedthe filling material out .Modifiedtioa of firin spout.

' This invention is not llmited to-machines in which the fillingspout is movable, but may embody various modifications in which the filling spout is fixed (with respect to the feed hopper; one embodiment of such modification being shown in Figs. 7, 8 and 9. In this modification a filling spout; designated as 66, is rigidly attached to the discharge throat 11 and is provided at its adjacent forward end with an annular flange 67 co- .ope'ratively seated inan annular recess formed in the member 68, suilicient clearance bein allbwed between the flange 67 an d the mem r 68 to permit of the necessary vertical movement of the member 68, as will be more clearly understood following. A collar" 69, rovided with a forwardly extending seml-elliptical flange bevelled downwardly and inwardly from its outer edge, is attached to the forward face of the member 68; and

extendin therefrom and supported thereby is a gri frame 70 which may. be made in the form of a. slightly .yieldable structure. The member 68 is attached to and supported by the rearward] extending member 71 whichzis connecte to the lower end of the link 22 which in this modification is bifurcated at its lower end in order to permit of its free vertical movement with respect to the fixed spout 66. The shield 49 is attached to the lower extremity of the link 22 and the pivoted rods 1313 are attached'to' the respective sidesof the bifurcated link 22. A. rodg72 is pivoted .at its forward end to the :link 22 at a point somewhat abovethe spout- 66 and its rear end (not shown) is pivotally attached to a stationary part of the machine. The rod '72 together with the rods 13 -13 and associated -arts form a parallel link mechanism whic restrains the movement of the member 71 and recessed member 68 to avertical motion. The trip. lever 28 and the serrated portion 25'are mounted in a manner similarto that described heretofore, but with slightly altered dimensions to accommodate this new position, all of which will be well understood by those skilled in the art. The gate 42 is the some as that heretofore described'andthe mechanism for releasing the IS the same as that heretofore described.

gate andlreturning it to its normal position It will therefore be seen that member 71 together with its. b a support 70 is adapted to be moved verticifily. with respect to the fill-ingspou't 66; this relative motion in the present embodiment being approximately 8 3 v It wilLbe understood-that other parts of the machine not ecificall described in connection with this modification are; the

same'as those embodied in the-completemachine-heretofore described.

It'will .-be understood by those skilled-in the art that although only one unit iscshown 'way of describing this invention yet a b pi urality ofunits', such as describedymay mounted side by 'side asis usually the custom in this type of machine; in such a case the feed hopper will extend the entire length "of the machine and will be common to all of the units, and 'a centrifugal im ller spout 12 and the hen le 40 pulled forward.

This carries the abutment 47 forward and 'will be provided for each discharged; iFoat'.

moves the arm 44 of the bell crank 45 upwardly, thereby moving the gate 42 into position to open the discharge throat 11, thereby placing the opening 11into communication with the spout 12. Simultaneously with this operation, and also brought about by the forward movement of the rod 38, thestop-41 is moved forward and the trigger 29 is permitted to gravitate into a vertical posit 1on where the hook 31 willengage the catch 43 to hol .the gate in 0 en position; also the lever 28 bein release by the stop 41 is moved forwar ly by the weight 24, thereby allowin the serrated edge 25 to enge thetop of the bag at this time being lled and to hold it on the guide 12 and adjacent the spout 12. The trip 17 is .now in enga ement with the lever 36 thereby allowing t e rod '38'to remain in its forward position. The commencement of the filling position is shown in Fig. 1.

-The filling material is now 'being fed out through the throat 11' and the spout 12 and is passing into the bag, which is being supported jointly by the tension spring 21 and the platform 55 of the weighing scale. In the present embodiment the spring 21 will withstand a given force before yielding and the scale supporting thexbag from the bottom rethe weight 57, which will beequal to the force necessary to overcome the resiliency of the spring 21. This will cause"an elongation in the spring 21 and thofspout 12 will move downward y about the' pivot points 1414' causing a corresponding upward movement of the. rear end of the bars 13 -13", which carry the trip 17. As this trip 17 is raised, the lever 36 is released and the balance weight 35 moves downwardly, thereby pulling the links 37' and 38 rearwardly, which causesthe stop 41 to engage the trip lever 28; and the stop 47to engage the arm 44 of the bell crank 45, thereby movi-n the end 44 downwardly in the slot 43.. he trip leverr28 is thereby pulled against the trigger 29 which 'disengages the latch 31 from the catch 43 and allows the gate 42 to be 'moved downwardly in response to the pull of weight 48, thereby closin the throat 11. The movement of the trip le 28 also raises the serrated edge 25, to thereby release the bag so that it might be removed. At this time, the bagis still partiall supported from the bottom and is also supported 'from the spout '12,and guide 12.

The filled bag is now removed and the load having been removed from the spring 21, it returns to its normal position carrying with it the spout 12 which returnsthe rods 1313 to their normal position and moves the trip 17 back'toits normal'position. This completes a cycle of operation, and the machine is now in position to repeat the operation as above described.

When it is desired to vary the mass'or weight of material placed in the bags it is merely necessary to change the weight 57, and for a fin'er adjustment also the riderweig'ht 64.

In the operation of the machine incorporating the modified spout structure, the bag is placed imposition on the support with the edge of-the bag nearest the machine passingcover theforwardl extending collar 69 and thence around t e lower part of the spout 66, andewhen in this position the end of the spout 66 will be extending. into the ,bag' It will therefore be seen that the.

' flange 67 will prevent the filling material from passing out betweeuthe member 71 and the spent 66. The operation of the machine is similar to that heretofore described except that in this modification the spout remains stationary andithe supipor't70 moves downwardly when the bag is lled; thereby moving the rods 13-13 downwardly to 0perate the mechanism associated therewith in' .a manner similar: to that heretofore described. This modification furnishes a simple and durable supporting mechanism which is free from any the disadvantages which may attend mei' -i anism in which the spou't is movable with respect to.the feed 70 hopper. In this modification as well as in the embodiment heretofore described the spout is free from the weighing scale mechanism.

Having thus described our invention with 76 particularity with reference to the preferred embodiment of the same, and having referred to some of the possible modifications thereof, it will be obvious to those skilled in the art after understanding our inven- 80 tion, that other changes and modifications may be made therein without departing from the spirit and scope of the invention, and we aim in' the pppended claims to cover such changes and. modifications as are within the scope of the invention.

\Vhat we claim is:

1. In a valve bag filling machine the combina tion of a spring su ported substant1ally horizontal valve bag fil ing spout adapted to extend into 2. ba a discharge throat in register with 5 id fi ing spout, and a scale pro vided with a 'bag supporting .port1on,'sa1d' spout and scale jointly providing means for supporting-a bag while itis being filled.

2. In'a valve .bag filling machme the combination of a discharge throat, a gate for said throat, a valve bag filling spout in register with saidvthr'oat, resilient means suprting said spent, a scale rovided with a E g supporting portion, sai spout and=scale jointly providing means for supporting a bag while it is bemg filled, and control means for said gate operated by the yielding of said resilient means. 106

3. In a valve bag filling machine the combination of a supporting structure, a discharge throat carried thereby, a gate for said throat, a valve bag filling spout in register with said throat and pivoted to said struc- 110 ture, resilient tension means supportmg said spout, a scale-provided with a bag supporting portion, and means operated by the pivotal movement of said ut to move said gate to thereby close sai throat.

4. In a valve bag filling machine the combination of a discharge throat, a pivotally. supported valve bag filli spout in continuous registration therewit resilient means supporting said ut, a gate for said threat, 1

' locking means to old sald gate in open position, and control means operated by the yielding of said tension means for releasing said locking means to. thereby move said gate to close said throat. I 5. In a valve bag filling machine the com bination of a discharge throat having an opening, a valve bag filling spout lnving an opening in register with said throat opening, resilient means and a weighing scale for m I said resilient means,

jointly supporting a bag to be filled, a gate for said throat, a look, a trip lever for releasing said lock, and means for operating said trip lever controlled by the yielding of to thereby close said throat opening. I Y

7 6. In a valve bag filling machine the combination of; a,-.discharge throat having an opening, a valve bagfilling spout having an openin 1n register with said throat openmg, resilient means and a weighing scale for jointly supporting a bag to be filled,

meansfor elosing said throat opening, and neans operated by the yielding of said resillent/ 111821118 for operating said closure means EDWARD L. BUSHMAN; KENNETH L. CURTIS. JOSHUA WAnn. 

